Background
Sandsdalen was born in Seljord, the son of farmer Johannes T. Sandsdalen and Hæge Vetlesdotter Kjøta.
Sandsdalen was born in Seljord, the son of farmer Johannes T. Sandsdalen and Hæge Vetlesdotter Kjøta.
He was also a proponent for Nynorsk, and a local politician. Sandsdalen was a part-time journalist for the newspaper Telemark Arbeiderblad from 1945 to 1962. From 1962 he was full-time journalist for Varden, where he edited the supplement Telemark Tidend.
Among his poetry collections are Det syng i skog og li from 1945, Mannen og moldi from 1946, the prize-winning Kantate ved Skien 600 års jubileum from 1958, and Relieff from 1968.
Sigmund Groven and Ivar Medaas have composed medlodies to some of his poems, and among his most popular songs are "Kom sol" and "Gje meg jorda til bustad". In 1998 Geirr Lystrup issued the album Kom sol på alle mine berg with lyrics by Sandsdalen and music by Sigmund Groven.
Among his plays are Anne Gonge from 1957 and Kari Sulto from 1958. He also wrote audio plays for radio.
His books on local history and folklore include Ormen i Seljordsvatnet from 1976, about the sea serpent living in Seljordsvatnet according to local tradition, Hundre folkeminne frå Seljord from 1982, Trollebotn from 1983, and Frå Kivlemøyan til Brurebergi from 1989.
He was a secretary for Telemark Mållag for fifteen years, and chaired the local chapter of the Labour Party. Sandsdalen"s poem about the Telemark cattle has been displayed on a stone erected at Dyrskuplassen in Seljord.